Fixing a dripping faucet is a manageable DIY project that can save water, reduce utility bills, and prevent water damage. The process involves identifying the leak source, shutting off the water supply, disassembling the faucet, and replacing worn components like washers, O-rings, or cartridges. Most repairs take under two hours and require basic tools, though the exact steps vary depending on whether you have a compression, cartridge, ceramic disc, or ball-type faucet.

• First critical step: Always turn off the water supply valves under the sink before starting any repair to prevent flooding ^[3][6][8].
• Common causes of leaks: Worn-out washers (compression faucets), corroded valve seats, loose O-rings, or damaged cartridges (ceramic disc/ball faucets) ^[6][8].
• Essential tools: Adjustable wrench, screwdrivers (flathead/Phillips), plumber’s grease, and replacement parts like O-rings or cartridges ^[7].
• Pro tip: Take photos during disassembly to simplify reassembly, and consider purchasing a faucet repair kit for all-in-one solutions ^[2].

Step-by-Step Faucet Repair Guide

Identifying the Leak and Preparing for Repair

Before disassembling anything, determine where the leak originates. Drips from the spout usually indicate a worn cartridge or washer, while leaks at the base suggest loose connections or damaged O-rings ^[5][9]. Start by shutting off the water supply valves located under the sink—turn them clockwise until tight ^[3][6]. If your sink lacks shut-off valves, turn off the main water supply to the house ^[9].

Prepare your workspace by covering the drain with a cloth or plug to prevent small parts from falling in ^[8]. Gather tools and materials:

• Adjustable wrench and screwdrivers (flathead/Phillips) for disassembly ^[7].
• Replacement parts: washers, O-rings, or a full cartridge (match the faucet brand/model if possible) ^[4][5].
• Plumber’s grease to lubricate new seals ^[7].
• White vinegar and a brush for cleaning mineral deposits from the aerator or valve seat ^[2].

For double-handle faucets, identify which side (hot or cold) is leaking by testing each handle separately after shutting off the water ^[2]. This helps isolate the problem before disassembly.

Disassembling and Repairing the Faucet

Compression Faucets (Traditional Two-Handle)

1. Remove the handle: Pry off the decorative cap on top of the handle, then unscrew the exposed screw and lift the handle off ^[8]. Use penetrating oil if the screw is stuck.
2. Access the stem: Unscrew the stem assembly with an adjustable wrench (turn counterclockwise). Inspect the rubber washer at the base of the stem—this is the most common failure point ^[6].
3. Replace the washer: Remove the old washer and match it to a new one from your hardware store. Apply plumber’s grease to the new washer before reinstalling ^[4][9].
4. Check the valve seat: If the leak persists, the valve seat (where the stem rests) may be corroded. Use a valve seat wrench to remove and replace it ^[8].

Cartridge, Ceramic Disc, or Ball Faucets (Single Handle)

1. Remove the handle: Pop off the decorative cap, unscrew the handle screw, and lift the handle. Some models require a hex key or Allen wrench ^[7].
2. Extract the cartridge/disc/ball: - Cartridge faucets: Pull out the cartridge with pliers (note the orientation for reassembly). Replace with an identical model ^[3]. - Ceramic disc faucets: Remove the disc assembly and inspect the ceramic plates for cracks. Replace the entire cartridge if damaged ^[2]. - Ball faucets: Lift out the ball and inspect the springs, seals, and valve seats. Replace the springs and seals if worn ^[8].
3. Clean and reassemble: Soak the aerator in vinegar to remove mineral buildup, then flush the faucet with water before reassembling ^[2]. Apply plumber’s grease to new O-rings or seals to ensure a watertight fit ^[7].

Reassembly and Testing

• Reinstall all parts in reverse order of disassembly, referencing your photos if needed ^[2].
• Turn the water supply back on slowly and check for leaks. If the faucet still drips, the cartridge or washer may not be seated correctly—disassemble and repeat the repair ^[3].
• For persistent leaks or complex issues (e.g., cracked faucet body), contact a professional plumber ^[6][8].